Inserts and Liners in Sandwich Panels

Sandwich panels have long been established in lightweight construction. They offer an optimal balance of weight and strength and are used in a wide variety of applications—from automotive manufacturing and mechanical engineering to industrial enclosures and specialized structures.

What is often underestimated here is that the actual functionality does not arise solely from the panel’s construction, but rather from specifically integrated inserts. This is because wherever forces are applied, components are fastened, or functions are integrated, pure sandwich structures reach their limits.

Why sandwich panels cannot withstand localized loads on their own

The sandwich panel principle is designed for load distribution over a large area. The outer layers absorb tensile and compressive forces, while the core provides spacing and shear stability. This system works exceptionally well—as long as forces are distributed over a large area. However, challenges arise as soon as localized loads occur:

• local overload of the core

• uncontrolled power transmission

• Risk of indentations or tears

This is exactly where inserts come into play. Inserts are strategically placed reinforcements within the sandwich structure. Their function is to safely absorb forces and transfer them into the composite.

Typical functions of inserts:

• Incorporation of Screw Connections

• Fastening of Attachments and Components

• Integration of hinges, hardware, or brackets

• Targeted reinforcement in high-stress areas

This is what transforms sandwich panels into true structural elements—not just flat materials. Reinforcements are used wherever lightweight construction and functionality must be combined:

• 
  Vehicle Manufacturing: Fastening of interior trim, technical components, or structural elements

• 
  Mechanical and Plant Engineering: Integration of Mounts, Interfaces, and Functional Elements

• 
  Industrial Enclosures and Panels: Installation of Doors, Hinges, or Control Elements

• Custom designs and specialized applications
  —for situations where standard solutions aren't enough

Requirements vary greatly depending on the application—which is precisely why the right design is crucial.

Why Experience and Coordination Are Crucial

Selecting and integrating inserts is not a standard process. Each application has specific requirements:

• What forces are at work?

• How often and with what intensity are they subjected to stress?

• What joining method is used?

This raises key questions regarding the placement and number of inserts, the choice of materials, and their integration into the composite structure. Without this coordination, the result is oversized solutions that add unnecessary weight or lack sufficient stability, posing a risk during use. Anyone seeking to assess the quality of sandwich panels must look beyond just the material or surface. Inserts reveal how deeply a supplier understands the system:

• Are stress factors taken into account?

• Has the integration been implemented properly from a technical standpoint?

• Does the solution work in real-world applications—not just on paper?

This is exactly what sets us apart from a mere materials supplier. We work with you to find solutions and see ourselves as a partner who develops effective solutions.

Conclusion: Function arises from integration, not from the material alone

Inserts turn a sandwich panel into a functional component. They determine whether forces are safely absorbed and whether a structure will function reliably over the long term.

Premium isn't evident in individual components, but rather in how they work together:

• well-thought-out planning

• precise integration

• and a clear understanding of how to use it

Those who work meticulously here reduce risks, streamline processes, and create solutions that stand the test of everyday use—not just on paper.